Abstract

This work presents the characterization of three laser power sources and one pyroelectric
radiometer which will be used for a Brazilian radiant power intercomparison. The electrically calibrated pyroelectric
radiometer will be used as a reference power meter during the intercomparison and its characterization considering the electrical calibration, the optical absorption film reflectance factor, the linearity and the relative spatial responsivity uniformity is presented. The three lasers sources of wavelengths, 405 nm, 638 nm and 785 nm are characterized according its short term drift. The lasers results showed that 2 lasers sources presented a short term drift of 1% after 1 hour warm up. The all detectors parameters are according to manufacturer specification, instead of linearity and absorption film reflectance factor.